Fatal error: Uncaught Error: Class "Drupal\Core\Entity\Query\ConditionBase" not found in /home/www/drupal8/test/core/lib/Drupal/Core/Config/Entity/Query/Condition.php:14
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/lib/Drupal/Core/Config/Entity/Query/Condition.php on line 14